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城市垃圾填埋场渗滤液循环回灌处理技术 总被引:10,自引:0,他引:10
城市垃圾填埋场渗滤液经循环回灌处理后,污染物浓度大大降低,填埋场填埋垃圾的湿度增加,稳定速度加快。适量的表面回灌可有效减少渗滤液水量,降低处理规范。与传统渗滤液处理方法相比,此技术投资省,效果好,操作、管理简单,很有应用价值。 相似文献
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生活垃圾填埋场渗滤液的新型处理技术 总被引:14,自引:0,他引:14
介绍了国内外垃圾填埋场渗滤液的处理技术,在此基础上提出了使得最终出水达标排放的新型处理技术(回灌-常规处理技术-膜分离)的工艺概况和特点,并将该技术与常规处理技术进行了经济分析。 相似文献
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垃圾填埋场甲烷气的排放及减排措施 总被引:11,自引:0,他引:11
预见了美国和我国在未来10—20a内填埋场甲烷气的排放情况,并针对我国的情况提出减少排放填埋气体的措施,即垃圾填埋由厌氧型改为半好氧型或渗滤液回灌的半好氧型,采用回收利用技术、自然减排和人工减排。 相似文献
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为研究生活垃圾卫生填埋场渗沥液浓缩液表层滴管技术的效果,采用现场试验的方法,对生活垃圾卫生填埋场生化+MBR+反渗透膜处理工艺产生的渗沥液的回灌量情况的变化、回灌后对库区内渗沥液水质COD、BOD、氨氮等产生的影响进行研究。结果表明,渗沥液浓缩液回灌实施期间,各月间回灌量差异明显;不同月份回灌液因降雨量不同而差异较大。但从试验来看,无论回灌液水质如何,库区产生的渗沥液水质COD、BOD和氨氮并未出现较大波动。试验证明,实施渗沥液浓缩液回灌是中小型垃圾卫生填埋场消纳渗沥液浓缩液的有效手段,填埋场可结合场区自身现状实施表层滴管技术处理渗沥液浓缩液。 相似文献
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Municipal landfill leachate induces cytogenetic damage in root tips of Hordeum vulgare 总被引:4,自引:0,他引:4
With increasing use of municipal solid waste landfills for solid waste disposal, municipal landfill leachate has become a serious concern for aquatic environments. Therefore, it is important to study its toxic effects on plants, animals, and humans. In the present study, the genotoxicity of leachate was investigated with the Hordeum vulgare root-tip cytogenetic bioassay, using Chemical oxygen demand (COD(Cr)) as a measure of leachate concentration. Leachate decreased the mitotic index (MI) in a concentration-dependent and a time-dependent manner. Compared with the negative control, reductions of MI of 37%, 56%, and 70% were detected for the highest leachate concentration (COD(Cr) 800 mg/L) in root tips treated for 24, 48, and 72 h, respectively. Leachate caused significant increases of micronucleus (MCN) frequencies in a concentration-dependent and a time-dependent manner. Among the exposure groups, COD(Cr) 40 mg/L leachate induced MCN formation after 24, 48, and 72 h of exposure, and the frequencies of MCN significantly increased with increasing concentrations of leachate from COD(Cr) 40 to 640 mg/L. In addition, pycnotic cells (PNC) occurred in root tips at all leachate concentrations tested after 24, 48, and 72 h of exposure, and PNC frequencies had a positive relation with the treatment concentration and the exposure time. The results also indicate that the concentration required to produce cytogenetic damage was lower in cells that had a longer exposure time. The results confirm that components of leachate may be genotoxic in plant cells and imply that long exposure to leachate at low concentrations in the aquatic environment may pose a potential genotoxic risk to organisms. The results suggest that the H. vulgare cytogenetic bioassay is efficient, simple, and reproducible in genotoxicity studies of leachate, and that there appears to be a correlation between the genotoxicity in a plant system and the COD(Cr) of leachate. 相似文献
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渗沥水是城市生活垃圾填埋场的主要污染物,填埋场渗沥水处理的好坏是衡量垃圾填埋场设计、建设、运营是否成功的重要标志。我们结合海口市的实际情况探讨了垃圾填埋场渗沥水产生量的影响因素,根据统计资料,总结提出了渗沥水产生量的预测方法,得出了渗沥水产生理预测值,比较选择了垃圾渗沥水的处理工艺,并对处理效果进行了预测。 相似文献
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